The phrase "appears to be persistent" is correct and usable in written English.
You can use it when describing something that seems to continue or endure over time, often in a context of behavior or conditions.
Example: "The issue with the software appears to be persistent, as it has occurred multiple times despite updates."
Alternatives: "seems to be ongoing" or "appears to be enduring."
Original sin appears to be persistent and determined also by the variables which are beyond the sole control of individual countries.
Nonetheless, there appears to be persistent deficiencies that require active interventions to remediate.
Nasal carriage of S. aureus appears to be persistent and the best predicator of subsequent colonization, whereas vaginal and anal carriage appear to be more transient.
In most patients, the ataxia appears to be persistent and non-progressive, although in one child definitive deterioration of motor function was seen, possibly related to the occurrence of a prolonged seizure.
However, interestingly the effect appears to be persistent even when more careful analyses adjusting for specific confounders that would a priori be hypothesised to be adversely affected at weekends, such as time to angiography for myocardial infarction and time to oesophagogastroduodenoscopy in peptic ulcer-related upper gastrointestinal haemorrhage.
In this narrower time range, the current appears to be persistent.
A plethora of pundits, law makers and think tanks continue to criticize the Obama Administration for presiding over what appear to be persistent failures in the foreign policy arena.
At a Los Angeles court hearing, U.S. District Judge Dolly Gee said there appeared to be persistent problems at the centers and the monitor would review potential violations of the 1997 Flores settlement, which set standards for the facilities.
Thus, with the exception of a slight but significant effect in UVC-treated plants and plants exposed to 25 mM of NaCl, the transgenerational effect does not appear to be persistent in successive generations of untreated plants.
