Why Reverse Edge sometimes does not load

We define edges as Directed with Reverse in our model. What I’ve noticed though that sometimes Reversed Edge does not load at all, although syntax is the same for all created edges.

Please give an idea…Thanks!

In theory reverse edges are handled (upserted and deleted) the same way and same time as their sibling (i.e. the “normal” edge), although they are created as edges (i.e. there is a an edge created backwards from the target vertex).
Could you describe your TigerGraph setup? Specifically: is it sngle-node or multi-node?

I believe, we are on a single node cluster. In fact, I have this problem on some, not all, reverse edges. And all of them have similarly structured syntax.