Make sure you update your wireless card drivers. Check your hardware provider for newer drivers.
I had issues with an intel 7260 card, with slow speed and connectivity issues. After updating drivers to the latest version my issues are gone..

Mikrotik uses 3.3.5 kernel and should not be affected but we don't have an official info at the moment. More info here in a duplicate post
viewtopic.php?f=2&t=137812

Researchers have accidentally discovered a new attack on the wi-fi protected access protocols used in wireless access points that makes it easier for outsiders to capture access credentials. The new attack captures the Pairwise Master Key Identifier (PMKID) and - according to the Hashcat password re...

(a similar issue exists in the IPv6 default config which is not loaded unless you reset to defaults AFTER enabling the IPv6 package, which lots of users probably will not do, and they end up with an empty allow-all firewall for IPv6) Since the post has gone away from the initial topic and deviated ...

Mikrotik staff already posted a reminder for users to upgrade.
More info here viewtopic.php?f=21&t=137572

The sad part it's that the exploit is more than two months old....

Since many of you guys were awaiting for a stable build for Wireguard, today we are even closer to that moment. Yesterday Jason Donenfeld lead developer submited the required patches for including Wireguard into mainline linux kernels. More info here http://lkml.iu.edu/hypermail/linux/kernel/1807.3/...

How about yours in these figures (ping time and transfer rate)? 2.4 GHz band is very dirty. I can not do a clean experiment. My hap ac^2 is receiving a signal from 46 stations near. Best results on channel 13, average 49 Mbit/sec. On channel 6 average 24 Mbit/sec and very unstable. Therefore, 40 MH...

This is know issue.

You can check a similar post on this forum viewtopic.php?f=7&t=132648

The Mikrotik engineers are working on a fix viewtopic.php?p=653984#p653984