Just did Elementalis 1-10 vs Zaladar about 6:00 - 6:10 AM EST.
Three times I used Permeate.
First time was intentionally on right side ally so did not see.
Second and third time, I tried on allies in other locations but the card would just hang in the air doing nothing with the word Cancel in the bottom right corner.

All these attempts were using the drag and drop method. It is possible I could have clicked on, zoomed into the target and still cast it.

Yet the strangeness and obvious bug is real, drag and drop for Permeate only works on the right side ally.

Never seen this with any other card.