qt.bluetooth.bluez: Error

HOSSAIN07

Hello,
I am getting this following Error while receiving data sometime

qt.bluetooth.bluez: L2Cap payload size 247 is smaller than specified size 512

From Btmon, I observed that

< HCI Event: Command Complete (0x0e) plen 12
 Supported Max TX Octets: 251
 Supported Max TX Time: 2120
 Supported Max RX Octets: 251
 Supported Max RX Time: 2120


ATT: Exchange MTU Request (0x02) len 2
 Client RX MTU: 527
ATT: Exchange MTU Response (0x03) len 2
 Server RX MTU: 512
> ACL Data RX: Handle 64 flags 0x02 dlen 251 #73 [hci0] 19.977887
> ACL Data RX: Handle 64 flags 0x01 dlen 251 #74 [hci0] 19.977899
> ACL Data RX: Handle 64 flags 0x01 dlen 14 #75 [hci0] 19.977901
 ATT: Write Command (0x52) len 511
 Handle: 0x0003

I updated the main.conf file

in main.conf
[General]
MaxMTU=247 # but it does not have any impact even if MaxMTU=512 is used

may be due to this error, Gatt client(IOS) is retransmitting the same data and the overall throughput is low

How can I fixed this issue and increase the throughput for gatt server?

thank you for your cordial support