Different circumstances, but I took a break from my ex-T because I was becoming too attached to her. I found the distance from the therapy relationship helped lessen those feelings, but when I went back, the distance meant I had to work hard at re-establishing the trust again. So that for me, was the downside. Also the attachment feelings very quickly reasserted themselves again, so I don't know how helpful having that break actually was.
Not saying it will be the same for you, you could go back to the therapy relationship after a break and find that you pick up right where you left off. It depends on the relationship you have with your T.
Ask yourself what is the main reason why you want this break. Also, talking about this with your T could be an excellent topic for discussion. If you can unpick it together, you may find you can work through those feelings in a beneficial way.
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