According to TMZ.com, the 25-year-old star was also concerned Lou – who also manages Britney Spears – could not put enough time into her and not give her the attention she requires because she works from Tennessee.
Despite the claim, Lindsay's representative Steve Honig has said the split between the two was "amicable" and they "remain friends".
The 'Mean Girls' star faced trouble on her first day at the morgue last week because she turned up late.
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However, when she did arrive on time for her next session, she was forced to undertake menial work such as cleaning toilets and washing soiled bed linens.
She was seen enjoying a cigarette break with two of her colleagues while she was there, and reportedly tried to apologise to staff by buying them burgers and cupcakes to make up for her tardiness the previous day, but they were rejected.