There are a lot of variations, especially regional ones, around the pronunciation of several vowels, often depending on their location in the word.

Affected ones include [e] vs [ɛ], [o] vs [ɔ], [œ̃] vs [ɛ̃], and [a] vs [ɑ].

They do not really cause understanding issues.

See:
– Pourquoi le français parisien a-t-il perdu pour la plupart la distinction entre /e/ et /ɛ/?
– Variations sur l'utilisation de [e] et [ɛ]
– Is “ai” in "j'ai" and “finirai” pronounced exactly like “er” in infinitives?