Is there a RAM-Limitation in LRC?? (Version 12.3)

Hardware: Ryzen 9 5950x; 64GB RAM; AMD RX 6950 XT
I often shoot larger panoramas with my Nikon Z7II (48MPix). LRC can create the first pano from e.g. 15 images. The RAM requirement is huge - usually more than 40GB. Unfortunately, after the pano is created, the RAM is not emptied.
If I want to create another pano, I can edit it, but I can't merge it. Regularly at around 42GB of RAM, LRC stops working. The message appears that the pano cannot be stitched together.
If I restart LRC and create this last pano again, it works fine. However, I have to restart LRC before every Pano. Two questions about this:
1. I have 64GB of RAM available. How can I tell LRC that more than 42GB can be used?
2. Is there a setting that allows the required RAM to be released again after pano creation?
Thanks for an answer and best regards