6.46.2 introduced DHCP client strange behavior

RouterOS General
1

hap ac and rb4011 were upgraded to 6.46.2 and stopped receiving ip address from ISP’s DHCP server.

/ip dhcp-client set [ find default-name=ether1 ] dhcp-options=clientid_duid,clientid

Solved the problem, but receiving IP address takes too long.

Furthermore, i managed to find out, that the reason of such strange behavior is not updating the packages, but upgrading the firmware.
So packages 6.46.2 with system firmware 6.46.1 worked great!
6.46.3 and 6.47beta35 has the same problem. And i cannot find any reasonable changes in 6.46.1-6.46.2 changelog to make such a strange DHCP client behavior.

Any help wold be appreciated.

2

Read recently in another thread that having STP/RSTP enabled on a DHCP target bridge can slow responses way down, you might try going to “none”.

3

tried, no result..
The thing is, that this change in DHCP client behavior is not even listed in changelog!