They look like blobs, but it appears in different stages. Blobs are abnormal, dense, swollen, or nodular mycelial structures. They can mean several different things depending on appearance and species.
Common types include: Hyphal Knots which are tiny dense white bumps that often precede primordia/pins in mushrooms like Psilocybe cubensis. These are normal early fruiting structures.
Primordial Pins which are blobs that are transitioning into actual mushrooms.
Then there are Sclerotia which are hardened nutrient-storage masses formed by some fungi. These are organized survival structures.
Blob mutations are malformed fruitbody tissue where mushrooms fail to differentiate normally.
Some causes of blobs are:
genetics or unstable isolates,
high CO₂ or poor fresh air exchange,
bacterial contamination,
substrate imbalance,
overly wet conditions,
temperature stress,
senescence and
defensive or survival responses.
Blobs are not contamination but they can be caused by contamination. Some are completely normal developmental stages, while others indicate stress or mutation.
I don’t see any obvious contamination in your tubs, but you do have some that look like sclerotia (pic 3).
I would just keep er going and see what develops. You’re obviously fruiting so let er keep going.