The garbage bags slipped from her hands, crashing to the ground.
In a word, no.
I presume you are referring to the apparent tense difference between slipped and crashing. However, crashing to the ground is a participle phrase (that is, a verb phrase functioning as an adjective) that modifies the noun, bags. As such it is under no requirement to conform to the tense of the main verb. As noted on the linked page,
A present participle attributes a quality of action to the noun, which is viewed as undertaking the action [...]. A past participle views the noun as having undergone the action expressed by the participle[.]
The bags, at the point when they were slipping, were also crashing; Thus the present participle (crashing) is called for.