Hymenopteran around a Garlic Mustard plant

Hymenopteran around a Garlic Mustard plant

Observation - Hymenopteran around a Garlic Mustard plant - UK and Ireland. Description: I saw this rather small hymenopteran repeatedly landing on and taking off again from leaves of a Garlic Mustard plant. It didn’t land on the flowers. I think there was a second individual around at one point but I didn’t obtain an image of the two togethe

I saw this rather small hymenopteran repeatedly landing on and taking off again from leaves of a Garlic Mustard plant. It didn’t land on the flowers. I think there was a second individual around at one point but I didn’t obtain an image of the two together. I am wondering (a) if I was observing activity preliminary to mating or (b) if the Philodromus spider* among the flowers was being actively avoided.
* My recent post: Spider on flowers of Garlic Mustard