15.1.2 OFX not saveing

working in 15.1.2, exited the project, went to another project, came back to the first project, opened it and the gammut mapping OFX still was in each node, but has no effect, and cannot be edited or changed

only way i could find to get the effect back is to use "remove OFX" in the node, and re-apply the same OFX

fortuantly for me i keep OFX in their own node