@BIGNEWYsorry for tagging you but it seems like my report was overlooked. Just making sure the team is aware of this issue as well as what @FalcoGersaid above since when this happens it makes LMC extremely hard to use. Again sorry for the tag.
I'm experiencing a freeze where frame rates seem less than 1 fps, it forces me to open task manager but I have to spam Ctrl+Alt+Delete multiple times to get it to come up. This doesn't happen all the time it seems hit or miss. Here's my DCS.log let me know if you need anything else thanks.
dcs.log
When using LMC correctly it'll sometimes start to act weird (I know it's still a WIP but I thought I'd share one of the issues it's having with the current build). You can see near the end of the track that I've included, LMC will start doing circles without any input from the MAN TRK controller while lasing near the end of the track replay. IMHO LMC was very good in 2.8 but as you can see there are some issues with it in 2.9.
LMC Issue.trk
Either adjust your seat, slouch, or use RCtrl+RShift+NUMPAD keys. If I'm in the CPG seat I usually just slouch and find the proper position, in the pilot seat I don't really need to do much except maybe bring my head forward a bit.
Wags was stationary in the video, that's why it seems so stable without LMC on. Cars are not considered targets so IAT doesn't track them (even though it should track anything with contrast). When using LMC it's a good idea to lase for a couple seconds that way the system knows how far away you're looking so it can then adjust the LMC slew speed based on the range and FOV of the TADS. Also it's better to just keep the laser on while using LMC so there's a constant update in range for the computer. You can also turn MAN RANGE to Auto and it will update the computer similar to lasing, or if you plan on keeping the TADS in the general area of a target point/waypoint you could also just use nav range by selecting it as an acquisition source.