"Object reference not set to an instance of an object" when adding an existing tag with Ctrl+,

Hi all,

I'm getting this "Object reference not set to an instance of an object" error sometimes when I try to add a tag to my translation using Ctrl+,

It doesn't happen in all segments thought, but when it does happen, it's with the same kind of tag (indent).

Before the tag floating list disappears with I hit Ctrl+, I can quickly see it is not populated, and instead has a big red cross over it.

Any ideas?

Thank you very much.

Martim

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