Error state indication for message with bitrate_switch=True

[MaratSabitov]

Describe the bug Error state indication observed for can.Message with is_fd=True and bitrate_switch=True

To Reproduce Steps to reproduce the behavior (please add longer code examples below):

If i create CAN bus with fd=True and create can.Message with is_fd=True outgoing message printout looks ok: ID: 0123 S F BS DLC: 8 ff ff ff ff ff ff ff ff

But if i try send can.Message with is_fd=True and bitrate_switch=True, i get error indication ID: 0123 S F BS EI DLC: 8 ff ff ff ff ff ff ff ff

Expected behavior I expect that bitrate_switch defines BRS bit set or not, and without any errors. Or it can not be used to set BRS bit - just for indication? What does it mean EI ? What error can cause it?

Additional context socketCAN used