Python changes path after loops is done - python-3.x

Question

I try to read all excel files in a directory to merge them into one df, which seems to work fine (the dataframe is correctly created)
How ever it seems that python is trying perform the loop a second time after all the files have been read, but in different location where the excel files do not exist and I get a traceback for 'file not found' which is obvious cause the files are not saved in this location.
It jumps from 'C:/users/folder/folder' to 'C:/users' and tries to loop again over all files, any idea why this happens?
The code I am using is the following:
import pandas as pd
import xlrd
import os
path = os.getcwd()
files = os.listdir(path)
files_xlsx = [f for f in files if f[-4:] == 'xlsx']
df = pd.DataFrame()
for f in files_xlsx:
data = pd.read_excel(f)
df = df.append(data)
print(df)
Here is the full traceback I get:
C:\ProgramData\Anaconda3\envs\pythonProject\python.exe "C:\Program Files (x86)\JetBrains\PyCharm 2020.2.1\plugins\python\helpers\pydev\pydevd.py" --multiproc --qt-support=auto --client 127.0.0.1 --port 58606 --file "C:/Users/Home/OneDrive/Ops/Media Management/Media Kitchen/Rezepte aktuell vom 10.05.2021/Rezepte Alphabetisch xlsx/XLSX merg.py"
pydev debugger: process 22124 is connecting
Connected to pydev debugger (build 202.6948.78)
C:\ProgramData\Anaconda3\envs\pythonProject\lib\site-packages\openpyxl\worksheet\header_footer.py:48: UserWarning: Cannot parse header or footer so it will be ignored
warn("""Cannot parse header or footer so it will be ignored""")
...
C:\ProgramData\Anaconda3\envs\pythonProject\lib\site-packages\openpyxl\worksheet\header_footer.py:48: UserWarning: Cannot parse header or footer so it will be ignored
warn("""Cannot parse header or footer so it will be ignored""")
Traceback (most recent call last):
File "C:\Program Files (x86)\JetBrains\PyCharm 2020.2.1\plugins\python\helpers\pydev\pydevd.py", line 1448, in _exec
pydev_imports.execfile(file, globals, locals) # execute the script
File "C:\Program Files (x86)\JetBrains\PyCharm 2020.2.1\plugins\python\helpers\pydev\_pydev_imps\_pydev_execfile.py", line 18, in execfile
exec(compile(contents+"\n", file, 'exec'), glob, loc)
File "C:/Users/Home/OneDrive/Ops/Media Management/Media Kitchen/Rezepte aktuell vom 10.05.2021/Rezepte Alphabetisch xlsx/XLSX merg.py", line 46, in <module>
data = pd.read_excel(f)
File "C:\ProgramData\Anaconda3\envs\pythonProject\lib\site-packages\pandas\util\_decorators.py", line 299, in wrapper
return func(*args, **kwargs)
File "C:\ProgramData\Anaconda3\envs\pythonProject\lib\site-packages\pandas\io\excel\_base.py", line 336, in read_excel
io = ExcelFile(io, storage_options=storage_options, engine=engine)
File "C:\ProgramData\Anaconda3\envs\pythonProject\lib\site-packages\pandas\io\excel\_base.py", line 1071, in __init__
ext = inspect_excel_format(
File "C:\ProgramData\Anaconda3\envs\pythonProject\lib\site-packages\pandas\io\excel\_base.py", line 949, in inspect_excel_format
with get_handle(
File "C:\ProgramData\Anaconda3\envs\pythonProject\lib\site-packages\pandas\io\common.py", line 651, in get_handle
handle = open(handle, ioargs.mode)
FileNotFoundError: [Errno 2] No such file or directory: 'C:\\Users\\$ACHR3-00.00.xlsx'
python-BaseException