Seems you are definitely making the right move if you are competing anytime soon.
Here's how it's described:
"Glucocorticoids are commonly used as therapeutic substances in sports, but are prohibited in-competition because, when administered via prohibited routes, there is clear evidence of systemic effects which could potentially enhance performance and be harmful to health."
FOOTNOTE: Today, glucocorticoids are prohibited in-competition when administered via
oral, rectal and all injectable routes (eg. intravenous, intramuscular, periarticular, intraarticular, peritendinous, intratendinous, epidural, intrathecal, intrabursal, intralesional, intradermal, and subcutaneous). At the time of the AAFs of Kipyokei and Lempus (and until 1 January 2022), glucocorticoids were not prohibited when administered by local injection (periarticular, intra-articular, peritendinous and intratendinous).
Did some digging and it seems that if you take this particular type it can show up to 30 days later in a competition test (which explains the spate of positives). There is also low to moderate evidence it could be performance-enhancing: