The issue appears on any seed but only when using hi-res texture pack VanillaBDCraft and when dropped items are on the ground.
Yes, issue persisted and still persists throughout all versions from Caves & Cliffs up to current one (1.17.11).
Issue also reported to texture pack maker (BD Craft), no response so far.
This is definitely not an RTX card issue. I've been having this issue on my GTX 1080 and Vanilla BDCraft texture pack. The FPS drop scales with texture resolution - at 64 is barely noticeable, but from 256 upwards the FPS tank below 30.