Try this:
Init an empty patch. Select LFO1. Drag modulation to any of its parameters from LFO2. Then select LFO2. Now the modulation that you just set up for LFO1 shows in LFO2 when you hover over that same parameter that you dropped the modulation to in LFO1.
Then select LFO3, and then LFO2. Now when you hover over that same parameter the erroneous parameter modulation doesn’t show up. If you then select LFO1 and then LFO2 again the LFO1 modulations show in LFO2 again.
Vital version 1.5.5.