drastic tcp window size change without scaling

Hopefully someone can help me understand what I'm seeing here.

1. A client Syn goes out with a window size of 8190 and no scaling factor.
2. Syn/ACK from server with a window size of 8192 and no scaling factor.
3. Client piggybacks the ACK with data, but suddenly the window size is 64240.
4. Server sends data and suddenly it's window size is 64240.

I don't understand how the window size can change so drastically when initial size is 8K and no scaling is enabled. Any insight is greatly appreciated.

No.     Time        TCPStrmDelta Source                Destination           Protocol Stream     SeQ        nSeQ       ACK        TCP Len B-flight Length Flags Window Size Info
  10528 181.247065  0.000000000  172.22.0.196          172.22.0.201          TCP      159        0                     0          0                     60     0x0002     8190        63973→443 [SYN] Seq=0 Win=8190 Len=0 MSS=1460
Frame 10528: 60 bytes on wire (480 bits), 60 bytes captured (480 bits) on interface 0
Ethernet II, Src: 92:69:13:b7:6d:b0 (92:69:13:b7:6d:b0), Dst: Vmware_98:6a:14 (00:50:56:98:6a:14)
Internet Protocol Version 4, Src: 172.22.0.196 (172.22.0.196), Dst: 172.22.0.201 (172.22.0.201)
Transmission Control Protocol, Src Port: 63973 (63973), Dst Port: 443 (443), Seq: 0, Len: 0
Source Port: 63973 (63973)
Destination Port: 443 (443)
[Stream index: 159]
[TCP Segment Len: 0]
Sequence number: 0    (relative sequence number)
Acknowledgment number: 0
Header Length: 24 bytes
…. 0000 0000 0010 = Flags: 0x002 (SYN)
Window size value: 8190
[Calculated window size: 8190]
Checksum: 0x2f91 [validation disabled]
Urgent pointer: 0
Options: (4 bytes), Maximum segment size
Maximum segment size: 1460 bytes
[Timestamps]
No.     Time        TCPStrmDelta Source                Destination           Protocol Stream     SeQ        nSeQ       ACK        TCP Len B-flight Length Flags Window Size Info
10529 181.247170  0.000105000  172.22.0.201          172.22.0.196          TCP      159        0                     1          0                     60     0x0012     8192        443→63973 [SYN, ACK] Seq=0 Ack=1 Win=8192 Len=0 MSS=1460
Frame 10529: 60 bytes on wire (480 bits), 60 bytes captured (480 bits) on interface 0
Ethernet II, Src: Vmware_98:6a:14 (00:50:56:98:6a:14), Dst: 92:69:13:b7:6d:b0 (92:69:13:b7:6d:b0)
Internet Protocol Version 4, Src: 172.22.0.201 (172.22.0.201), Dst: 172.22.0.196 (172.22.0.196)
Transmission Control Protocol, Src Port: 443 (443), Dst Port: 63973 (63973), Seq: 0, Ack: 1, Len: 0
Source Port: 443 (443)
Destination Port: 63973 (63973)
[Stream index: 159]
[TCP Segment Len: 0]
Sequence number: 0    (relative sequence number)
Acknowledgment number: 1    (relative ack number)
Header Length: 24 bytes
…. 0000 0001 0010 = Flags: 0x012 (SYN, ACK)
Window size value: 8192
[Calculated window size: 8192]
Checksum: 0xf8ce [validation disabled]
Urgent pointer: 0
Options: (4 bytes), Maximum segment size
Maximum segment size: 1460 bytes
[SEQ/ACK analysis]
[Timestamps]
No.     Time        TCPStrmDelta Source                Destination           Protocol Stream     SeQ        nSeQ       ACK        TCP Len B-flight Length Flags Window Size Info
10530 181.247194  0.000024000  172.22.0.196          172.22.0.201          TLSv1    159        1          113        1          112        112        166    0x0018     64240       Client Hello
Frame 10530: 166 bytes on wire (1328 bits), 166 bytes captured (1328 bits) on interface 0
Ethernet II, Src: 92:69:13:b7:6d:b0 (92:69:13:b7:6d:b0), Dst: Vmware_98:6a:14 (00:50:56:98:6a:14)
Internet Protocol Version 4, Src: 172.22.0.196 (172.22.0.196), Dst: 172.22.0.201 (172.22.0.201)
Transmission Control Protocol, Src Port: 63973 (63973), Dst Port: 443 (443), Seq: 1, Ack: 1, Len: 112
Source Port: 63973 (63973)
Destination Port: 443 (443)
[Stream index: 159]
[TCP Segment Len: 112]
Sequence number: 1    (relative sequence number)
[Next sequence number: 113    (relative sequence number)]
Acknowledgment number: 1    (relative ack number)
Header Length: 20 bytes
…. 0000 0001 1000 = Flags: 0x018 (PSH, ACK)
Window size value: 64240
[Calculated window size: 64240]
[Window size scaling factor: -2 (no window scaling used)]
Checksum: 0x26cb [validation disabled]
Urgent pointer: 0
[SEQ/ACK analysis]
[Timestamps]
Secure Sockets Layer
No.     Time        TCPStrmDelta Source                Destination           Protocol Stream     SeQ        nSeQ       ACK        TCP Len B-flight Length Flags Window Size Info
10531 181.247636  0.000442000  172.22.0.201          172.22.0.196          TLSv1    159        1          146        113        145        145        199    0x0018     64240       Server Hello, Change Cipher Spec, Encrypted Handshake Message
Frame 10531: 199 bytes on wire (1592 bits), 199 bytes captured (1592 bits) on interface 0
Ethernet II, Src: Vmware_98:6a:14 (00:50:56:98:6a:14), Dst: 92:69:13:b7:6d:b0 (92:69:13:b7:6d:b0)
Internet Protocol Version 4, Src: 172.22.0.201 (172.22.0.201), Dst: 172.22.0.196 (172.22.0.196)
Transmission Control Protocol, Src Port: 443 (443), Dst Port: 63973 (63973), Seq: 1, Ack: 113, Len: 145
Source Port: 443 (443)
Destination Port: 63973 (63973)
[Stream index: 159]
[TCP Segment Len: 145]
Sequence number: 1    (relative sequence number)
[Next sequence number: 146    (relative sequence number)]
Acknowledgment number: 113    (relative ack number)
Header Length: 20 bytes
…. 0000 0001 1000 = Flags: 0x018 (PSH, ACK)
Window size value: 64240
[Calculated window size: 64240]
[Window size scaling factor: -2 (no window scaling used)]
Checksum: 0x9dc5 [validation disabled]
Urgent pointer: 0
[SEQ/ACK analysis]
[Timestamps]
Secure Sockets Layer