Crystal veibns stop regrowing randomly?

[trankuill]

Happens all the time when I'm mining gemstones, I mine a vein, go around mining everything else, come back, and it hasn't regrown. Weird. Go around mining all other veins again, the first one still hasn't regrown. Fast forward a couple of minutes, more veins have stopped regrowing. It really messes up my tempo and I have to switch lobbies regularly because of it. Does anyone know why that happens?

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