yes the water is too warm. That is one problem. You
do not want to get above 80f in your water or they will not do well at all.
I also noticed that you used cuttings that had bare stems sticking into the lower part. Now this is just my opinion and the way I have found success; when I take cuttings and prepare them to go into the bubbler, I cut the stem off just about 1cm below the lowest leaf node on the stem, where the leaf was removed. I use a razor to cut that spot smooth and then
very lightly skin the stem from the node down. Then immediately dip into hormone gel to prevent air embolism(air bubble in the center of the stem) from happening.
Another problem you are having is(IMO and no offense) that you are putting profit ahead of process. Cloning from flowering plants is not impossible but for some plant strains, switching over is difficult in the best of circumstances. Switching over from full on flowering is killing your odds of success. You may have to sacrifice something in order to get the results that you want down the line. Either you take one plant that is in flower and put it back under 24hr lighting to get it to revert back to the veg state, and then take cuttings when it is back to ffull vegging and is healthy, or you buy more seeds to go ffrom.
If this particular strain is the best for you and you really want to keep this particular phenotype, then you can "reveg" one of the flowering plants. If time is more important then buy new seeds and get them in the soil asap, because revegging then cloning is going to take longer than just starting new seeds. Just my opinion
Also, if you just cant get the bubble cloner to work for you then try cloning in coco coir. I have a friend who is an accomplished grower and he just has a fit trying to clone. He tried all off the methods with poor results, then he tried cloning in small cups off coco coir and has nearly 100% success.