Packet drops after upgrading to routeros 6.45.6

Hey guys,
I have two separate wireless p2p links, Link1: two sxtlight5nd routers, Link2: two LHG5 routers
After upgrading from 6.43.x to 6.45.6 i noticed both links now have packet drops(ping drops) on both links, nothing else changed but routeros version.
On LHG link sometimes the wireless link completely drops so i have to reboot one of them.
On SXT link the connection remain stable but now my VoIP fxo-fxs over this link experience voice drops and i can’t talk to the other side very well.
Anyone else have these problems?
How can i downgrade to latest Long-Term version or 6.43.x? Is it possible?

Did you try to change a frequency? You might have interference from another new antenna..!

What protocol do you use? Frequency? Distance of the Link?
Changed any protocols and do some tests?
Did you run a spectral scan?
What is your channel width?

Yes you can downgrade, load the version you want to downgrade to, drag and drop it in the winbox, then go to system packages and click on downgrade…