The phrase "curious problem" can be substituted with a number of other descriptive phrases that convey a similar sense of intrigue and mystery. For instance, one might use the term "anomalous dilemma" to describe a situation that is both unusual and puzzling. Alternatively, one could use the phrase "bewildering predicament" to describe a scenario that is confusing or perplexing in nature. Other potential synonyms for "curious problem" might include "enigmatic challenge," "perplexing conundrum," or "mysterious quandary." Whatever one's preferred phrasing, it is clear that there are many ways to describe a situation that is both curious and problematic.