Butress settling at pressure plate

I have just installed a 15 x 30 pool. When I started filling with water one of the buttresses was leaning in about 1.5 inches. Is this ok?

Thanks.

Bumping this back up to see if someone can help.

Thanks for bumping this up. I actually removed the water and liner and placed a 4" concrete block under the buttress and pressure plate. The pool is filled and working great. This area settled because when I initially installed the buttress I removed a large rock and i didn't get it backfilled correctly.

Thanks for following up. Good to know and a great reminder to build a pool on level, undisturbed soil. Congrats on getting it straightened out.