adjective
problematic
prah-bluh-MAT-ik/ˌprɑːbləˈmætɪk/
Causing difficulty or concern.
The cracked bridge makes this walking route problematic for travelers.

Etymology
From a word for a task or question proposed for consideration, the adjective first meant “doubtful” or “unsettled.” Its modern difficulty-causing sense probably arose through a noun use in sociology.
In context
the extensions of this space are problematic because it allows for infection to spread quite easily
More examples
- The new schedule is problematic for parents who need child care.
- Missing data makes the study's conclusions problematic.
- His habit of sharing private messages is problematic.
Forms
problematic
problem noun — A difficulty that needs a solution.
problematically adverb — In a way that causes difficulty.
Similar words
- troublesome
- Emphasizes the trouble or annoyance something causes.
- difficult
- Emphasizes effort required rather than reasons for concern.