I seem to be going thru a similar frustration so lets blame the gear☺
I drift align and all seems good and I also take time exposures with mount stationary and the scope in home position and I line up to have the center in the middle of the camera viewing frame...this has always worked for me but not now...
One thing I am thinking is the level bubble is somehow off as it shows level but standing back and looking at the mount it does not seem level so I am today looking for a spirit level to provide a better measure.
I have even thought the ground could be subsiding and maybe this is close to the truth in so far as the mount is on some paver bricks placed on the lawn and maybe the grass is still compacting and there is movement in that area.
Also make sure all adjustment knobs are snug and when adjustment complete make sure its opposite is seated so nothing can move.
In any event stay calm and know you are not the only one having such frustrations.
Anyways if 30 shows trails go down to 20 seconds and if thats too long drip again.
One positive from such an approach was I got to do short exposure and high iso that turned out very well....so you can bet when we find we dont need polar to be perfect it will some how become cured
Good luck.
Alex